Shoe cementing machine



April 19, 1932. H. WALTHER SHOE CEMENTING MACHINE Filed March 31, 1930 61 0 2 v. l a 0 a 4 1 X 1 w m w my 2 LM wwg 9 7 .1 m w a 4 as a 0 1 7 1 23 1 m m a w 3 0 a o m 1 n N a o 5, 4 4W 0 a m y a m 2 7 a a 2 2 9 tal 1carries the head 2 of the machine.

Pum Apr. 19, 1932 UNITED STATES PATENT OFFiCE SHOE GEMENTING MACHINEApplication filed March 31, 1980, Serial No. 440,569, and in GermanyApril 26, 1929.

In the manufacture of cemented shoes the parts to be cemented are firstroughened, then provided with an adhesive, and finally they are pressedtogether. Hitherto the roughening and cementing is performed in twoseparate successive operations.

The primary object of the present invention resides in the feature thatthe roughening, drilling and cementing is performed in w one continuousoperation. To this end the adhesive is supplied right after the drillingand the cement is applied to the fibres as soon as they becomeroughened.

By combining both operations a great deal W of time is saved. Moreoverowing to the application of the adhesive to the fibresimmediately afterthey are roughened there isalmost no possibility of these fibres cominginto touch with the fingers of the attendant S or of becoming coveredwith dust. This is of considerable importance as perspiration and dusthinder an intimate contact between the adhesive and the fibres.

A further important feature of the invention resides in the step thatthe adhesive is not only applied to the surface of the materials to becemented but it is also forced deeply into the material itself thusforming a connection between the different layers, as m up er leather,linings and soles.

ther objects of my invention are pointed out in the specification andthe claims hereunto annexed.

The drawings illustrate an embodiment of a machine according to myinvention.

Fig. 1 is a side elevation of the head of the machine with the containerfor the cement re%oved;

i 2 is a head Figs. 3 and 4 are illustrative vertical sections showingthe roughening tools and their driving means;

Figs. 5 to 10 show difierent successive posis tions and operations ofthese tools;

Fig. 11 is a cross-section of several layers of material connectedaccording to my invention.

The structure of the maahz'ne.The pedrisl;

front elevation of the machine the head is journalled the shaft 3 whichis driven by power in anv convenient manner. At the front end of theshaft is fixed a cam 4 which cooperates with the roll 32 of the slide 5and imparts to the latter a downward movement. The slide 5 is raised bythe spring 6. On the slide 5 is pivoted by means of the bolt 7, thecarrier 8 of the awl-like roughening-tools 15. To the lower end of thecarrier is fastened the guide 9 of the tools 15.- The to free ends ofthe tools 15 form cutting edges adapted to penetrate into the materialto be roughened.

On the shaft 3 is fixed a cam-disc 10 hav ing cam-grooves on the frontand on the rear surface. Into the front groove engages the roll 33 ofthe lever 11 fastened to the rear end of the swinging shaft 12. To thefront end of the shaft 12 is fastened the lever 13 which imparts aslight up and down movement to the slide 14 guided in the carrier 8. Theslide 14 transmits its movement to the roughening tools 15 whichreciprocate vertically therewith. The front groove causes the shaft 12to oscillate twice during every revolution.

Into the cam groove at the back of the disk 10 projects the roll 34 ofthe lever 16. The lever 16 is fastened to the rear end of the swingingshaft 17. To the front end of the latter is fastened the lever 18. Thislever is 30 connected by means of the link 19 with the carrier 8 andimparts to the latter a small lateral movement. The amplitude of thislateral movement is adjustable by the slot and pin connection 20.

In the slide 14 is accommodated a rack 21 so as to move therewith in avertical direction. The rack 21 engages at its left end (see Fig.

.2) with a bolt 35 in a fixed vertical groove 36 of the machine, so thatit is prevented from moving horizontally. The rack 21 meshes with apinion 22 which is in mesh with another pinion ,22'.

Both pinions are journalled in the slide 14. While the slide 14 islaterally oscillating it carries with it the pinions 22, 22' which arethereby forced to rotate by the rack 21 which is laterally immovable.

By these means the tools 15 are also rotated alternatively to the leftand to the right. .As no stated the rotating tools 15 are adapted tomove with the slide 14 up and down.

In the structure of the machine therefore two parts have a verticalmovement, the carrier 8 with the guide 9 of the tools 15 and the slide14 with the tools 15. The slide 14 moves within the carrier 8 andpartakes of its lateral oscillation. By the downward movement of thecarrier 8 the guide 9 is brought to bear upon the work and its lateraloscillation effects the feed of the work inasmuch as the tools 15 engagethe work during the said oscillation. By the downward movement of theslide 14 the tools 15 are forced into the material. The oscillation ofthe slide 14 causes the tools to rotate.

The machine-head 2 is provided with an adjustable roll 23 for guidingthe shoe or the sole. The shoe is held against the rest 24 while theroll 23 engages underneath the edge of the sole. A second roll may bearranged to keep the sole-edge down.

The glue feeding mechanism is controlled by the cycle of the machine.

The shaft 3 drives by means of the spur wheels 30, 31 a pump arrangedwithin the vessel 25 to force the glue contained therein through thepipe 26 and the channel 27 into the bores 37 of the guide 9. Thepressure forcing the glue into the pipe 26 is controlled by means of acheck-valve 28 allowing the glueto return into the vessel ,when thepressure exceeds the force of the adjustable spring 29 A The operationof 2 7m ma0hzne.-The workpiece is held against the rest 24 and the ma-.chine is set going. The guide 9 first moves down till it sits fastly onthe leather (see Fig. 5). At the same time the tools 15 move downwardsand penetrate into the material (seev Fig. 6). Then the tools 15 andtheir guide perform a common downward and lateral movement to bring theshoe out of contact with the rest 24 and to feed it forward. During thefeed-movement the tools 15 rotate and tear up the leather (see Fig. 7).Then the tools raise-to allow the cement to enter from the channel 27into the bores 37 (see Fig. 8). Finally the tools are moved once more bythe front groove of the cam disc 10 downwards and press the cement intothe holes made by their first downward movement (see Fig. 9). Thereby apart of the cement is pressed between the single layers of material andis also spread over the surface of the uppermost layer (see Fig. 11).-

Finally the tools and their guide 9 return upward and move to the rightinto their original position (see Fig. 10). Now the shoe abuts againagainst the rest 24, and the operation repeats in the manner described.

In the: drawings, the operation of the machine is illustrated inconnection with a lasted shoe.

As seen from Fig. 11 of the drawings the I assaeea cement forced intothe layers of the material forms rivets 38 connecting the differentlayers. The sole may be roughened and cemented in a like manner. Beforethe sole is pressed onto the shoe an intermediate film of cement may bespread over the parts Worked upon in the manner described above. Thisintermediate film sticks tothe heads of the said rivets and form areliable connection between the shoe and the sole.

What I claim is 1. In a shoe cementing machine, awl-like toolspenetrating into the part worked upon, a guide accommodating the saidtools in corresponding bores and adapted to abut against the said part,means for supplying cement into the said bores, and means for forcingthe cement from the bores into the holes made by the tools by a repeatedmovement of the tools against the work-piece.

2. In a shoe cementing machine, awl-like tools penetrating into the partworked upon, means for moving the tools laterally while in thepenetrated position for feeding the workpiece, a guide accommodating thesaid tools in corresponding bores and adapted to abut against the partworked upon, means for supplying cement into the said bores, and meansfor forcing the cement from the bores into the holes made by the toolsby a repeated movement of the tools against the work-piece while in thelateral position.

3. In a shoe cementing machine, awl-like tools penetrating into the partworked upon, means for moving the tools laterally while in thepenetrated position for feeding the work-piece, means for rotating thetools while moving laterally, a guide accommodating the said tools incorresponding bores and adapted to abut against the part worked upon,means for supplying cement into the said bores, and means for forcingthe cement from the bores into the holes made by the tools by a repeatedmovement of the tools against the work-piece while in the lateralposition.

4. In a shoe cementing machine, solid pointed tools, means for causingpenetration of the tools in the parts worked upon, and means for causingsaid solid pointed tools to assist in applying cement to the worked outparts.

5. In a shoe cementing machine, pointed tools, means for causingpenetration of the tools in the parts worked upon, means for causingsaid tools to assist in applying cement to the worked out-parts, andmeans for causing the tools to feed the work.

6. In a shoe cementing machine, solid pointed tools, means for causingpenetration of the tools in the parts worked upon, means for applyingcement to the parts worked upon by the said tools, and means for causingthe latter to penetrate the worked parts after the application of thecement. i

'7. In a shoe cementing machine, solid pointed tools, means for causingpenetration of the tools in the parts worked upon, means for supplyingcement under pressure to the worked parts, and means for causing saidsolid pointed tools to assist in bringing the cement into position foradherence with the Worked parts.

In testimony whereof I aflix my signature.

HEINRICH WALTHER.

